Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a08762db138ac179732808286d0235042e5a73b6651f4101d5d48d79e2c1402b' 
  AND token = '9Bx8mEcWZjimv7e0XeDb0/3sN+hvfOwTChiDelN8EmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}